Power transmission and control.



L w, NELSON, POWER TRANSMSSSION AND CONTROL.

APPUCATIN FILED DEC. 6; 1909.

2 SHEETS-SHEET 1.

5)' A Awful@ l 4marrant) sTAtrgEhs-ATENT OFFICE.

LEWIS W. NELSON7 OF PHILADELPHIA, PENNSYLVANIA, ASSIGNO'R, BY MESNE ASSIN- MENTS, TO U. S. LIGHT 8a HEAT CORPORATION, OF NIAGARA FALLS, NEW YORK, A

CORPORATION 0F NEW YORK.

POWER TRANSMISSON AND CONTROL.

Specification of Letters Patent.

Patented awr. 29, 19in? To uit whom it' may con/:ern

ic 1t known that I, Lewis lV. NELSON, a

citizen of the United States, and a resident invented certain new and useful Improvew ments in Power Transmission and Control, of .vhicli. the following is a specification.

ibiects of the present invention `are to provide a compact, light and efficient dynamoelectric machine capable ot' transmitting mechanical power and of changing speed. ratios and also ca )able ot' receiving electrical enel-gy and delivering mechanical energy in various speed ratios: to provide for transm'itting the power of a prime mover to a driven part at various speed ratios without affecting the speed and output of the prime mover, and to provide a simple, reliable and compact dynamo-electric apparatus capable of a variety of uses.

Other objects of the i vention will appear from the following rescription taken in connection with the accompanying drawings in which I have illustrated embodi ments,4 but not the only embodiments of my invention. v

Figure 1, is a diagrammatic view illustrating apparatus embodying features of the invention inapplication to a powerlplant such as can be used on a vehicle. Fig. 2, is a view taken on a line lying to the right ot' the right hand field coil l of Fig. l, showing a few more windings than are illustrated in that figure, and Fi". is a diagrammatic view illustrating an embodiment of the invention. in which the parts are arranged coucentrically.

n the drawings l and 2 are mechanically independent armatures.

Ais a field structure common to both armatures and provided with windings 4 4 for creating a flux through both armatures. The general path of this flux is indicated by the outer dotted line in Fig. 1.

5, are auxiliary windings for varying the Hun in either armature 1 or As shown in the drawing it is assumed to vary the flux in the armature :2 and it does this by creating a flux, the path of which is indi cated in Fig. 1 by the inner dotted line; so 'that as shown in Fig. l. the flux throng-h armature 2 would be greater than the flux.

through armature l. The relative arrangement of the field and armatures is not essential. .is shown/in Fig. l they are arranged as a transvi-u'sal electrolmagnetic tinywheel type. lVithout intending to linut the arrangement there is shown in Fig. an external and internal armature of the (lframme ring type." It unnecessary to illustrate any more of the well known types1 'because they are fully understooi'l bv those skilled in the artV u in Fig. 3, 3 is the field, la and 2 are the arn'iaturesT +A l1 are the windings for ("eating a flux through both armatures and 5 are the auxiliary windings for varying the flux in one ot' said armatures. In Fig. 3, the dotted lines extending through both matures indicate the path ol the flux created by the windings 42%. le and the dotted lines extending through the inner armature and field structure indicate the flux produced. by the auxiliary wil'idings 5?. As shown in Fig. 3. the' armature 2a is shown as receiving the greater tiux. However, in this case. as in Fig. l. the outer armature may be arranged to receive the greater flux. By applying current to the armatures and energizing the field windings it is possible to driveveither one otl the armatures or to drive them both, or to drive them both at different speeds. By .applying mechanical energy to either' one of' the armatures and energizing the fields and electrically connecting the other armature to the tirst mentioned armature, it is possil'ile to transmit mechanical power at various speed ratios.

For the sake of a l'urther explanation the invention will be described in connection with the power plant shown in Fig. 1, which involves a storage battery 6 and a prime mover 7; the storage battery serving to take fluctuations of load above and below the average load otn the prime mover. The armature .1 is n'iechanically connected with the engine shaft F5 and the armature 2 is. connected with the driving shaft 9, which in turn may be connected to a vehicle drive. not shown. The tield structure 3 is shown as fixed and supported. for example hy brackets l0. There are provisions for connecting the armature l. the armature 2 and the battery in parallel. A conductor 11 connects the .battery with the brush of Fmi the armature 1. A conductor l2 connects the battery With the controller contacts 13 and 114-. The iield windings t ere connected across the armature 1 by conductors 15 and 15. A conductor 1'? connects the bsttery with a two-point switch 18 and this switch in its iirst position" connects the conductor 17 with the conductor 19 which connects with the controller contact 20, which in turn is connected With the contacts 21, 22 and 23, through resistance 211, as shown. in its second position the switch 18 makes not only the connections described, but ulso connects 'the conductor 17 with the conducto'r 25 which connects With the brush of the armature 1. The field windings d are connected between conductors 19 and 11 by conductors 1G 16. The auxiliary Wind ying 5 is connected by means of the con ductors 26 and 27 across 'the resistance 24. rihe brush of thenrinature 2 is connected by a conductor .28 with the movable arm 29 of the controller andthe other brush of the armature 2 connects by a conductor 30 with the Contact 31 of the movable arm of 'the controller. The contacts 32 and 33 of the controller are connected by a conductor 34 through asvfitch 35 and resistance 36. 1n describing; the coifinectionsA to the field it must be borne in niind that they con, of course, be excited from appropriate sources other than those mentioned. As shown in Fig. 1,-the parts are in what may be calied the off position and in the case of a vehicle it may be assumed to be at rest; that is, the engine is stopped.'

1n operating it it is desired to start the vehicle without starting,r the engine 7, the armature 2, may be utilized. The switch 18 is moved to itsrst dotted line position, thus completing a circuit from the battery through the lield 1windings rfby means ci' conductor 17svvitcli 18, conductors 19 and 16', field windings d and conductors 15 and 11 to the battery. This places the vehicle in readiness to be started when the coni troller contacts 29 and 31 are simultaneously moved to the first foi-Ward position.

' in Which contact 29 engages contact 28,-and

Ilill contact 31 engages contact 14. This energizes the armature 2 and the auxiliary field coils 5 by a circuit from the battery through conductor l17, switch 18, conductors 19 and 26, field coils' 5, conductor 2'?, contact 28, controller contact 29, conductor 28, amature 2, conductor 30, controller contact 31, contacts 141 and 13 and conductor 12 tothe battery.. The auxiliary coil 5 is thus connected in series with the armature 2 andis also shuntedlby the resistance 211.

This produces :i strong field and also allows i' gi-heavy armature current toiow, since some current will' dow by way of resistance .24

from conductor 19 to -contact23 and the armature. A high torque, will 'thereby be produced to start the yehicle.` By moving the controller. erm successively over contacts 21 and' 20, steps or resistance 2/1 are cui; out,thus permitting more current to iow'to the armature and at the sometime weakening the field 5 cally inoperative and the entire ield excite- 'tion 'is furnished by coils e. This is the po rsition for 'obtaining the maximum speed.

l v i until inthe final po# ,.'sition of the controller the i'ield 5 is prectir)The zirmature 1 will immediately oper-4 ivill deliver current to the battery and to the armature 2, provided the controller is in one of its active positions. 1f it is desired to operate the armature 2 in the reverse direction, as in backing the vehicle, the controller may be moved in the opposite direction to energize the right hand contacts .23 and 22, and the contact 13. 'l his will complete the armature circuit in the opposite direction. Only two reverse contacts are illustrated although more may be added if desired. 1t will also be noted that When.

the contacts 29 and 31 are in. the neutral position 4on contacts 33 and 32, if the armature 2 is revolving, and the shunt coils L1 are excited, the'ai'mature 2 may be utilized as a brake by closingl the switch 35 and allowing the armature 2 to expend its generator energy through circuit 34, including resistance 36.

What I claim is:

1. 1n combination, un internal combustion engine,v a shunt field dynamo electric T11 machine mechanically connected to said engine to drive 4the same or be driven thereby, a driven shaft, a second shunt 'field dynamo electric machine mechanically connected to said shaft to drive thesame, e source of elec- 'j trical energy, anda switch having a plurality of operating positions, said switch in one position causing energizstion of the shunt field of said second' machine from said source and in a second operative position maintaining said lirst connections and completing a circuit `from said source to energize the field and armature of said fdrst niachine, whereby said first machine may operate as a motor to .start the engine and 'thereafter as a generator driven by said engine to supply current to the tield of said second machine.

in combination, an internal combustion engine, a shunt ield dynamo electric machine mechanically connected to said engine to drive the same or be driven thereby, a driven shaft, a second shunt field dynamo electric machine mechanically connected to said shaft to drive the same, a source of electrical energy, a switch havin r a plurality ot operating positions, said switch in one Jposition causing energization of the shunt :"ield of said second machine from said source at in a second operative position main "l iirst connections and completing circuit from said source to energize the iieid and armature ot' said first machine, whereby said first machine may operate as a motor to start the engine and tliereaiter as a generator driven by said engine to supply current to the tield of said second machine, and a separate controller for controlling the armature current of said second machine.

3. in combination, a dynamo electric inachine having an armature and a ield winding, a storage battery, a switch tor connecting said field winding to be energized from said battery, a controller for connecting said armature to be e erffized from said battery whereby said machine may bc operated as a motor, second dynamo electric machine, means 'for driving said` second machine as a generator, and Yconnections whereby saidI switch may maintain said first mentioned connections and simultaneously complete the 'field and armature connections of said second machine whereby said second machine may operate said first machine as a motor and also charge said storage battery.

4. In combination, an internal combustion engine, a dynamo electric machine rnechanicaily connected thereto, a second dynamo electric machine, a shaft to be drivein mechanically connected to said second 'dynamo electric machine, a storage battery, a switch for energizing the field of said second machine from said battery, andn ar controller for energizing the armatore of said second machine from said battery, said controller' controlling means for simultaneously weakening the field excitation and strengthening the armature current of said machine, said switch in a second operative position serving to maintain connections for said second machine and to complete the .field and armatore circuits tor sold first dynamo electr'c machine.

5. in coniliiination, an internal combustioi'i engine, a shunt wound dynamo electric machine mechanically connected to the engine shaft, a driven shaft, second dynamo electric "chine provided with shunt and og'zsimechan' connected to o .s, said switch in s first operaaerving to energize the shunt field of sain second dynamo electric machine from the .storagebattery, a controller having a plurality of operative positions, said controller in its trst operative position serving to connect the armature of said second dynamo electric machine tothe storage battery, througha resistance, and to connect the series field therco]c in shunt to said resistance, said controller serving in its successive positions to cnt ont sections of said .resistance to simntaneonsly weaken Said series fieidand increase the current in Said armature, and said switch serving itssecond operative position to connect said first dynamo electric machine in parallel with said second machine and the storage battery whereby said first machine may start the engine and thereafter operate to charge the battery and to supply current to operate said second machine.

t). In combination, a dynamo electric machine having an armature and a field winding, a storage battery, a switch for connecting said field winding to be energized by said battery, means for connecting said armature to be energized by said battery whereby said machine will operate as a motor, a mechanical load to be driven thereby, a second dynamo electric machine, means for driving said second machine as a generator, and connections whereby said switch may maintain said first mentioned connections and simnltanemisly complete the field and armature circuits to said second niachine, whereby said mechanical load may be started by said motor operated from said battery and thereafter without interrupting said connections, said load maybe driven from said motor operated from said generator.

7. ln coinl'iination, a prime mover requiring an initial starting impulse, a dynamo electric machine connected thereto lo furnish said starting impulse or to be driven as a generator thereby, a driven shaft, a motor for driving said shaft, a source of electrical energy, anda switch for connecting said motor to said source to be operated thereby, said switch in a second position serving to maintain said connections and simultaneously connect said generator to furnish ur-- rent to said .motor whereby said driven shaft may bestartcfl by said motor operated by said electrical source and thereafter operated by said generator without interruption.

8. In coinbinationya prime `mover requiring an initial starting impulse, a dynamo electric machine coni'iectedy thereto to furnisl said starting impulse or to be'driven as A 'sommeil said genertor 4 gnerrator *mt ing the @per Ein tesimfmy whereof have hereuso signed my nam@n EWS W. www.

bn the pesencg 02?-- CLIFFOHL El. AssmL, M. GmLEGAN.' 

